If I had to pick from this list, I like DangerousCustomDesigns the best because it doesn't lock you into anything. But, in an era when most kids can't even make change for a buck or know the difference between "there", "they're" and "their", it's a bit much to expect them to be able to spell such a long title. You get past about 8 letters or so and you're flirting with disaster. The typo-squatters will get more hits than you do. You need something short and sweet that is spelled phonetically, or nobody's ever gonna get there.
Something like Plates_R_Us.com (which is currently unused) describes what you do without narrowing it down too far, is short and easy to say/spell, and easy to remember/associate with your product and what you do.